Electronics Forum | Fri Oct 28 06:55:53 EDT 2005 | pavel_murtishev
Hello! I suspect that our MPM AP25 has separation problems (poor stencil � PCB separation). I observe a lot of �dog ears� after print stroke. And this is 100% machine problem, I�m sure. What machine parts should I check first time to avoid separatio
Electronics Forum | Fri Oct 28 06:59:45 EDT 2005 | Rob
From what I remember there is a "snap off" setting in the AP25, where you can set the separation speed & I think it may also vibrate the board a little.
Electronics Forum | Thu Mar 23 10:21:38 EST 2006 | chatech
Recently my company (graphic card suppliers) have experenced some pad to board separation under the processor. I have researched and find that a number of papers have been written about this, but they give no solution, Is anyone out there experencing
Electronics Forum | Fri Oct 28 15:35:57 EDT 2005 | chunks
Try turning off the vacuum. Could be related.
Electronics Forum | Wed Nov 02 01:55:08 EST 2005 | pavel_murtishev
We are using dedicated vacuum support. So we have support under all components.
Electronics Forum | Wed Nov 02 07:44:09 EST 2005 | chunks
So if you manually wipe the stencil your problem goes away?
Electronics Forum | Fri Oct 28 09:27:36 EDT 2005 | russ
havfe you tried all paste manufacturers? Dog ears are usually from a little sticking to the aperture walls. this is usually the result of stencil design and or table seperation speed.
Electronics Forum | Mon Oct 31 03:32:45 EST 2005 | pavel_murtishev
Good day, We are using dedicated vacuum tooling. I can�t turn off the vacuum because board will not be fixed at all. BR, Pavel
Electronics Forum | Mon Oct 31 03:35:41 EST 2005 | pavel_murtishev
Good day, I simply switched the production from MPM to other printing machine. Defect disappeared. Process parameters and process materials were the same. Stencil was the same. �Dog hides� somewhere in the machine. BR, Pavel
Electronics Forum | Mon Oct 31 14:48:45 EST 2005 | valuems
Hello again Just thought of another problem. Do you have board supports under the component that you are having problems with? harry
